.accordion {
  width: 600px;
  margin: 100px auto;
  border: 2px solid cadetblue;
}

.accordion dt {
  height: 50px;
  line-height: 50px;
  font-size: 24px;
  font-weight: bold;
  background-color: antiquewhite;
}

.accordion dd {
  display: none;
}

.accordion dd.show {
  display: block;
}
